Enhanced Room‐Temperature Photoluminescence Quantum Yield in Morphology Controlled J‐Aggregates
Abstract Supramolecular assemblies from organic dyes forming J‐aggregates are known to exhibit narrowband photoluminescence with full‐width at half maximum of ≈9 nm (260 cm−1). Applications of these high color purity emitters, however, are hampered by the rather low photoluminescence quantum yields...
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doaj-b234936ef3434d698c212e962233e4eb2021-02-17T08:51:15ZengWileyAdvanced Science2198-38442021-02-0184n/an/a10.1002/advs.201903080Enhanced Room‐Temperature Photoluminescence Quantum Yield in Morphology Controlled J‐AggregatesSurendra B. Anantharaman0Joachim Kohlbrecher1Gabriele Rainò2Sergii Yakunin3Thilo Stöferle4Jay Patel5Maksym Kovalenko6Rainer F. Mahrt7Frank A. Nüesch8Jakob Heier9Laboratory for Functional Polymers Empa Swiss Federal Laboratories for Materials Science and Technology Überlandstrasse 129 Dübendorf CH‐8600 SwitzerlandLaboratory for Neutron Scattering and Imaging (LNS) Paul Scherrer Institute Villigen CH‐5232 SwitzerlandLaboratory of Inorganic Chemistry Department of Chemistry and Applied Biosciences ETH Zürich Vladimir Prelog‐Weg 1 Zürich CH‐8093 SwitzerlandLaboratory of Inorganic Chemistry Department of Chemistry and Applied Biosciences ETH Zürich Vladimir Prelog‐Weg 1 Zürich CH‐8093 SwitzerlandIBM Research–Zurich Säumerstrasse 4, Rüschlikon Zürich CH‐8803 SwitzerlandLaboratory for Functional Polymers Empa Swiss Federal Laboratories for Materials Science and Technology Überlandstrasse 129 Dübendorf CH‐8600 SwitzerlandLaboratory of Inorganic Chemistry Department of Chemistry and Applied Biosciences ETH Zürich Vladimir Prelog‐Weg 1 Zürich CH‐8093 SwitzerlandIBM Research–Zurich Säumerstrasse 4, Rüschlikon Zürich CH‐8803 SwitzerlandLaboratory for Functional Polymers Empa Swiss Federal Laboratories for Materials Science and Technology Überlandstrasse 129 Dübendorf CH‐8600 SwitzerlandLaboratory for Functional Polymers Empa Swiss Federal Laboratories for Materials Science and Technology Überlandstrasse 129 Dübendorf CH‐8600 SwitzerlandAbstract Supramolecular assemblies from organic dyes forming J‐aggregates are known to exhibit narrowband photoluminescence with full‐width at half maximum of ≈9 nm (260 cm−1). Applications of these high color purity emitters, however, are hampered by the rather low photoluminescence quantum yields reported for cyanine J‐aggregates, even when formed in solution. Here, it is demonstrated that cyanine J‐aggregates can reach an order of magnitude higher photoluminescence quantum yield (increase from 5% to 60%) in blend solutions of water and alkylamines at room temperature. By means of time‐resolved photoluminescence studies, an increase in the exciton lifetime as a result of the suppression of non‐radiative processes is shown. Small‐angle neutron scattering studies suggest a necessary condition for the formation of such highly emissive J‐aggregates: the presence of a sharp water/amine interface for J‐aggregate assembly and the coexistence of nanoscale‐sized water and amine domains to restrict the J‐aggregate size and solubilize monomers, respectively.https://doi.org/10.1002/advs.201903080exciton lifetimeJ‐aggregatesmicroemulsionsphotoluminescence quantum yieldradiative excitons |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Surendra B. Anantharaman Joachim Kohlbrecher Gabriele Rainò Sergii Yakunin Thilo Stöferle Jay Patel Maksym Kovalenko Rainer F. Mahrt Frank A. Nüesch Jakob Heier |
spellingShingle |
Surendra B. Anantharaman Joachim Kohlbrecher Gabriele Rainò Sergii Yakunin Thilo Stöferle Jay Patel Maksym Kovalenko Rainer F. Mahrt Frank A. Nüesch Jakob Heier Enhanced Room‐Temperature Photoluminescence Quantum Yield in Morphology Controlled J‐Aggregates Advanced Science exciton lifetime J‐aggregates microemulsions photoluminescence quantum yield radiative excitons |
author_facet |
Surendra B. Anantharaman Joachim Kohlbrecher Gabriele Rainò Sergii Yakunin Thilo Stöferle Jay Patel Maksym Kovalenko Rainer F. Mahrt Frank A. Nüesch Jakob Heier |
author_sort |
Surendra B. Anantharaman |
title |
Enhanced Room‐Temperature Photoluminescence Quantum Yield in Morphology Controlled J‐Aggregates |
title_short |
Enhanced Room‐Temperature Photoluminescence Quantum Yield in Morphology Controlled J‐Aggregates |
title_full |
Enhanced Room‐Temperature Photoluminescence Quantum Yield in Morphology Controlled J‐Aggregates |
title_fullStr |
Enhanced Room‐Temperature Photoluminescence Quantum Yield in Morphology Controlled J‐Aggregates |
title_full_unstemmed |
Enhanced Room‐Temperature Photoluminescence Quantum Yield in Morphology Controlled J‐Aggregates |
title_sort |
enhanced room‐temperature photoluminescence quantum yield in morphology controlled j‐aggregates |
publisher |
Wiley |
series |
Advanced Science |
issn |
2198-3844 |
publishDate |
2021-02-01 |
description |
Abstract Supramolecular assemblies from organic dyes forming J‐aggregates are known to exhibit narrowband photoluminescence with full‐width at half maximum of ≈9 nm (260 cm−1). Applications of these high color purity emitters, however, are hampered by the rather low photoluminescence quantum yields reported for cyanine J‐aggregates, even when formed in solution. Here, it is demonstrated that cyanine J‐aggregates can reach an order of magnitude higher photoluminescence quantum yield (increase from 5% to 60%) in blend solutions of water and alkylamines at room temperature. By means of time‐resolved photoluminescence studies, an increase in the exciton lifetime as a result of the suppression of non‐radiative processes is shown. Small‐angle neutron scattering studies suggest a necessary condition for the formation of such highly emissive J‐aggregates: the presence of a sharp water/amine interface for J‐aggregate assembly and the coexistence of nanoscale‐sized water and amine domains to restrict the J‐aggregate size and solubilize monomers, respectively. |
topic |
exciton lifetime J‐aggregates microemulsions photoluminescence quantum yield radiative excitons |
url |
https://doi.org/10.1002/advs.201903080 |
work_keys_str_mv |
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